Method and device for transmitting system information, base station and user equipment

Abstract

A method and a device for transmitting SI, a base station and a UE are provided. The method includes: determining a position of an SI window corresponding to each piece of SI, and determining a configuration parameter of each SI window in accordance with the position of the SI window; transmitting a DRS to a UE, the configuration parameter of each SI window being carried in an eSIB in the DRS; and transmitting the SI to the UE through each SI window. Each SI window corresponds to one piece of SI, and parts of the SI windows are configured in a radio link measurement window for a serving cell to which the UE belongs.

What is claimed is: 
     
       1. A method for transmitting System Information (SI), used in a base station, comprising:
 acquiring a configuration parameter of the radio link measurement window, determining a position of an SI window corresponding to each piece of SI in accordance with the configuration parameter of the radio link measurement window, and determining a configuration parameter of each SI window in accordance with the position of the SI window; 
 transmitting a Discovery Reference Signal (DRS) to a User Equipment (UE), the configuration parameter of each SI window being carried in an enhanced System Information Block (eSIB) in the DRS; and 
 transmitting the SI to the UE through each SI window, each SI window corresponding to one piece of SI, and parts of the SI windows being configured in a radio link measurement window for a serving cell to which the UE belongs; 
 wherein the configuration parameter of the radio link measurement window comprises a period of the radio link measurement window, a duration of the radio link measurement window and a subframe offset of the radio link measurement window within the period; 
 wherein the configuration parameter of each SI window comprises a period of the SI window, a basic subframe offset of the SI window within the period, and a length of the SI window; 
 wherein the acquiring the configuration parameter of the radio link measurement window, determining the position of an SI window corresponding to each piece of SI in accordance with the configuration parameter of the radio link measurement window, and determining the configuration parameter of each SI window in accordance with the position of the SI window comprises: 
 setting the period of each SI window as an integral multiples of the period of the radio link measurement window; 
 setting the subframe offset of the radio link measurement window within the period as the basic subframe offset of the SI window within the period; 
 calculating a start frame number of each SI window through the formula: the start frame number of the SI window % T=FLOOR(x/10), where T=SI−Periodicity/10, SI−Periodicity represents the period of the SI window, and x represents a start subframe offset of the SI window within the period; and 
 calculating a start subframe number of each SI window through the formula: the start subframe number of the SI window=x % 10. 
 
     
     
       2. The method according to  claim 1 , wherein the eSIB further comprises first information for indicating the UE that the SI is not transmitted within a DRS subframe, or second information for indicating the UE that both the eSIB and the SI are transmitted simultaneously within the DRS subframe. 
     
     
       3. The method according to  claim 2 , wherein the determining the position of the SI window corresponding to each piece of SI and determining the configuration parameter of each SI window in accordance with the position of the SI window further comprises:
 calculating the length of each SI window through the formula: w=FLOOR (Duration/N1), where w represents the length of the SI window, Duration represents a duration of the radio link measurement window, and N1 represents the quantity of the SI windows configured in the radio link measurement window; and 
 calculating a start subframe offset of each SI window within the period through the formula: x=Offset+(n−1)*w, where Offset represents the basic subframe offset of the SI window within the period, and n represents a serial number of the SI window in an SI list and n is greater than or equal to 1. 
 
     
     
       4. The method according to  claim 1 , wherein the eSIB further comprises third information for indicating the UE that both the eSIB and a first piece of SI are transmitted simultaneously within the DRS subframe, and fourth information for indicating the UE that the SI other than that transmitted simultaneously with the eSIB is not transmitted within the DRS subframe. 
     
     
       5. The method according to  claim 4 , wherein the determining the position of the SI window corresponding to each piece of SI and determining the configuration parameter of each SI window in accordance with the position of the SI window further comprises:
 calculating the length of each SI window through the formula: w=FLOOR (Duration/(N1−1)), where w represents the length of the SI window, Duration represents the duration of the radio link measurement window, and N1 represents the quantity of the SI windows configured in the radio link measurement window; and 
 calculating the start subframe offset of each SI window within the period through the formula: x=Offset+(n−2)*w, where x represents the start subframe offset of the SI window within the period, Offset represents the basic subframe offset of the SI window within the period, and n represents the serial number of the SI window in the SI list and n is greater than or equal to 2. 
 
     
     
       6. The method according to  claim 2 , wherein when the eSIB and the SI are transmitted simultaneously within the DRS subframe, Downlink Control Information (DCI) corresponding to the eSIB is the same as, or different from, DCI corresponding to the SI, and when the DCI corresponding to the eSIB is different from the DCI corresponding to the SI, the DCI corresponding to the eSIB is scrambled through a same Radio Network Temporary Identity (RNTI) as, or a RNTI different from, the DCI corresponding to the SI. 
     
     
       7. The method according to  claim 1 , wherein the radio link measurement window is a DRS Transmission Window (DTxW) or a Discovery Signals Measurement Timing Configuration (DMTC) window. 
     
     
       8. A method for transmitting System Information (SI), used in a User Equipment (UE), comprising:
 receiving a Discovery Reference Signal (DRS) from a base station, a configuration parameter of an SI window corresponding to each piece of SI being carried in an enhanced System Information Block (eSIB) in the DRS; 
 determining a position of each SI window in accordance with the configuration parameter of the SI window; and 
 receiving the SI from the base station through each SI window, each SI window corresponding to one piece of SI, and parts of the SI windows being configured in a radio link measurement window for a serving cell to which the UE belongs, 
 wherein a configuration parameter of the radio link measurement window comprises a period of the radio link measurement window, a duration of the radio link measurement window and a subframe offset of the radio link measurement window within the period; 
 wherein the configuration parameter of each SI window comprises a period of the SI window, a basic subframe offset of the SI window within the period, and a length of the SI window; 
 wherein the configuration parameter of the SI window corresponding to each piece of SI is determined by the base station in accordance with a position of the SI window corresponding to each piece of SI and the position of the SI window corresponding to each piece of SI is determined by the base station in accordance with the configuration parameter of the radio link measurement window in the following process: 
 setting the period of each SI window as an integral multiples of the period of the radio link measurement window; 
 setting the subframe offset of the radio link measurement window within the period as the basic subframe offset of the SI window within the period; 
 calculating a start frame number of each SI window through the formula: the start frame number of the SI window % T=FLOOR(x/10), where T=SI−Periodicity/10, SI−Periodicity represents the period of the SI window, and x represents a start subframe offset of the SI window within the period; and 
 calculating a start subframe number of each SI window through the formula: the start subframe number of the SI window=x % 10. 
 
     
     
       9. The method according to  claim 8 ,
 wherein the determining the position of each SI window in accordance with the configuration parameter of the SI window comprises: 
 calculating a start frame number of each SI window through the formula: the start frame number of the SI window % T=FLOOR(x/10), where T=SI−Periodicity/10, SI−Periodicity represents the period of the SI window, and x represents the start subframe offset of the SI window within the period; and 
 calculating a start subframe number of each SI window through the formula: the start subframe number of the SI window=x % 10. 
 
     
     
       10. The method according to  claim 9 , wherein the eSIB further comprises first information for indicating the UE that the SI is not transmitted within a DRS subframe, or second information for indicating the UE that both the eSIB and the SI are capable of being transmitted simultaneously within the DRS subframe. 
     
     
       11. The method according to  claim 10 , wherein the determining the position of each SI window in accordance with the configuration parameter of the SI window further comprises calculating the start subframe offset of each SI window within the period through the formula: x=Offset+(n−1)*w, where x represents the start subframe offset of the SI window within the period, Offset represents the basic subframe offset of the SI window within the period, n represents a serial number of the SI window in an SI list and n is greater than or equal to 1, and w represents the length of the SI window. 
     
     
       12. The method according to  claim 9 , wherein the eSIB further comprises third information for indicating the UE that both the eSIB and a first piece of SI are transmitted simultaneously within the DRS subframe, and fourth information for indicating the UE that the SI other than that transmitted simultaneously with the eSIB is not transmitted within the DRS subframe. 
     
     
       13. The method according to  claim 12 , wherein the determining the position of each SI window in accordance with the configuration parameter of the SI window further comprises calculating the start subframe offset of each SI window within the period through the formula: x=Offset+(n−2)*w, where x represents the start subframe offset of the SI window within the period, Offset represents the basic subframe offset of the SI window within the period, n represents the serial number of the SI window in the SI list and n is greater than or equal to 2, and w represents the length of the SI window. 
     
     
       14. The method according to  claim 9 , wherein the eSIB further comprises fifth information for indicating the UE that all the SI windows are configured in K radio link measurement windows, and the configuration parameter of each SI window further comprises a period of each radio link measurement window and the quantity of the SI windows configured in each of the K radio link measurement windows. 
     
     
       15. The method according to  claim 14 , wherein the determining the position of each SI window in accordance with the configuration parameter of the SI window further comprises:
 calculating the start subframe offset of each SI window within the period through the formula: x=Offset+(k−1)*Periodicity+(m−1)*w, where x represents the start subframe offset of the SI window within the period, k=FLOOR((n−1)/N2)+1, m=n % N, n represents the serial number of the SI window in the SI list and n is greater than or equal to 1, N2 represents the quantity of the SI windows in each of the K radio link measurement windows, m represents a serial number of each SI window in a k th  radio link measurement window, Periodicity represents the period of each radio link measurement window, Offset represents the basic subframe offset of the SI window within the period, and w represents the length of the SI window; or 
 calculating a virtual start subframe offset of each SI window within the period through the formula: x′=(n−1)*w, where x′ represents the virtual start subframe offset of the SI window within the period, n represents the serial number of the SI window in the SI list and n is greater than or equal to 1, and w represents the length of the SI window, and 
 calculating the start subframe offset of each SI window through the formula: x=Offset+x′+FLOOR((n−1)/N2)*(Periodicity—N2*w), where x represents the start subframe offset of the SI window, N2 represents the quantity of the SI window in each of the K radio link measurement windows, Offset represents the basic subframe offset of the SI window within the period, and Periodicity represents the period of each radio link measurement window. 
 
     
     
       16. The method according to  claim 8 , wherein the radio link measurement window is a DTxW or a DMTC window. 
     
     
       17. A User Equipment (UE), comprising:
 a receiver configured to receive a Discovery Reference Signal (DRS) from a base station, a configuration parameter of an System Information (SI) window corresponding to each piece of SI being carried in an enhanced System Information Block (eSIB) in the DRS; and 
 a processor connected to the receiver and configured to determine a position of each SI window in accordance with the configuration parameter of the SI window, 
 wherein the receiver is further configured to receive the SI from the base station through each SI window, 
 wherein each SI window corresponds to one piece of SI, and parts of the SI windows are configured in a radio link measurement window for a serving cell to which the UE belongs, 
 wherein a configuration parameter of the radio link measurement window comprises a period of the radio link measurement window, a duration of the radio link measurement window and a subframe offset of the radio link measurement window within the period; 
 wherein the configuration parameter of each SI window comprises a period of the SI window, a basic subframe offset of the SI window within the period, and a length of the SI window; 
 wherein the configuration parameter of the SI window corresponding to each piece of SI is determined by the base station in accordance with a position of the SI window corresponding to each piece of SI and the position of the SI window corresponding to each piece of SI is determined by the base station in accordance with the configuration parameter of the radio link measurement window in the following process: 
 setting the period of each SI window as an integral multiples of the period of the radio link measurement window; 
 setting the subframe offset of the radio link measurement window within the period as the basic subframe offset of the SI window within the period; 
 calculating a start frame number of each SI window through the formula: the start frame number of the SI window % T=FLOOR(x/10), where T=SI−Periodicity/10, SI−Periodicity represents the period of the SI window, and x represents a start subframe offset of the SI window within the period; and 
 calculating a start subframe number of each SI window through the formula: the start subframe number of the SI window=x % 10.